参数资料
型号: CORE10/100-RM
厂商: Microsemi SoC
文件页数: 59/106页
文件大小: 0K
描述: IP CORE10/100 ETHERNET MAC
标准包装: 1
系列: *
Core10100 v4.0
MII Transmit Operation
CLKT
TX_EN
COL
Write Points
Internal Operation
Collision Detected
TXD[3:0]
data
data
data
data
CRS
Deferring
Figure 4-11 · MII Transmit Operation
Frame Format
Core10100 supports the Ethernet frame format shown in Figure 4-12 (“B” indicates bytes). The standard Ethernet
frames (DIX Ethernet), as well as IEEE 802.3 frames, are accepted.
46B – 1500B
7B
1B
6B
6B
2B
4B
PREAMBLE
SFD
DA
SA
LENGTH /
TYPE
DATA
PAD
FCS
Figure 4-12 · Frame Format
Table 4-41 · Frame Field Usage
Field
PREAMBLE
SFD
DA
SA
LENGTH/ TYPE
DATA
Width
(bytes)
7
1
6
6
6
0-1500
Transmit Operation
Generated by Core10100
Generated by Core10100
Supplied by host
Supplied by host
Supplied by host
Supplied by host
Receive Operation
Stripped from received data
Not required for proper operation
Stripped from received data
Checked by Core10100 according to current
address filtering mode and passed to host
Passed to host
Passed to host
Passed to host
Generated by Core10100 when
PAD
0-46
CSR.23 (DPD) bit is cleared and data
Passed to host
supplied by host is less than 64 bytes
FCS
4
Generated by Core10100 when
CSR.26 bit is cleared
v4.0
Checked by Core10100 and passed to host
59
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